SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function lessOrEquals (children 1)
     ExpressionList (children 2)
      Function dateDiff (children 1)
       ExpressionList (children 3)
        Literal \'s\'
        Function UTCTimestamp (children 1)
         ExpressionList
        Function now (children 1)
         ExpressionList (children 1)
          Literal \'UTC\'
      Literal UInt64_2